Test Iterator Symbol.dispose calls return method

test/built-ins/Iterator/prototype/Symbol.dispose/invokes-return.js

@@ -0,0 +1,30 @@
+// Copyright (C) 2023 Ron Buckton. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-%iteratorprototype%-@@dispose
+description: Return value of @@dispose on %IteratorPrototype%
+info: |
+  %IteratorPrototype% [ @@dispose ] ( )
+
+  1. Let O be the this value.
+  2. Let return be ? GetMethod(O, "return").
+  3. If return is not undefined, then
+    a. Perform ? Call(return, O, « »).
+  4. Return undefined.
+
+features: [explicit-resource-management]
+---*/
+
+const IteratorPrototype = Object.getPrototypeOf(
+  Object.getPrototypeOf([][Symbol.iterator]())
+);
+
+const iter = Object.create(IteratorPrototype);
+var returnCalled = false;
+iter.return = function () {
+  returnCalled = true;
+  return { done: true };
+};
+
+iter[Symbol.dispose]();
+assert.sameValue(returnCalled, true);

test/built-ins/Iterator/prototype/Symbol.dispose/return-val.js

@@ -0,0 +1,21 @@
+// Copyright (C) 2023 Ron Buckton. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-%iteratorprototype%-@@dispose
+description: Return value of @@dispose on %IteratorPrototype%
+info: |
+  %IteratorPrototype% [ @@dispose ] ( )
+
+  1. Let O be the this value.
+  2. Let return be ? GetMethod(O, "return").
+  3. If return is not undefined, then
+    a. Perform ? Call(return, O, « »).
+  4. Return undefined.
+
+features: [explicit-resource-management]
+---*/
+const IteratorPrototype = Object.getPrototypeOf(
+  Object.getPrototypeOf([][Symbol.iterator]())
+);
+
+assert.sameValue(IteratorPrototype[Symbol.dispose](), undefined);